Problem_of_the_Week_6

Problem_of_the_Week_6 - final speed of the boat? (d)...

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Problem of the Week 6 Jack and Jill are maneuvering a 3000 kg boat near a dock. Initially the boat’s position is <2, 0, 3> m and its speed is 1.3 m/s. As the boat moves to position <4, 0, 2> m, Jack exerts a force < 400, 0, 200> N and Jill exerts a force <150, 0, 300> N. (a) How much work does Jack do? (b) How much work does Jill do? (c) Assuming that we can neglect the work done by the water on the boat, what is the
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Unformatted text preview: final speed of the boat? (d) Without doing any geometrical calculations, say what is the angle between the (vector) force that Jill exerts and the (vector) velocity of the boat. Explain briefly how you know this. (e) What effect does Jill have on the boat’s motion?...
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This note was uploaded on 12/07/2011 for the course PHYS 172 taught by Professor ? during the Fall '08 term at Purdue.

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